Hardiness zone: Best in zone 8Height: 50 – 70Spread: 15Habit: Distinctly upright with tree gradually spreading out in old ageLight: Best in sun or partial shade<Soil: Very tolerant of soils; acidic and moist conditions preferableFlowers: redFruit: often reddish, maturing to brown winged fruitLandscape use:Excellent specimen tree for lawn, park or street; plant in groups for best effect; may be used in confined spaces or as avenue treesHistory: ‘Armstrong’ is a cross between Acer rubrum and Acer saccharumPests\Problems: Pests: leaf hoppers and borers can cause considerable damageSignificant Features: Beautiful silver-grey bark; rapid growth; extremely long petioles

Michael A. Dirr

Dr. Michael A. Dirr is a horticulturist associated with the University of Georgia. Dr. Dirr has published over 300 scientific and popular publications and has authored seven books, including A Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture and Propagation and Uses. It has sold more than 250,000 copies.

Richard C. Webel

Richard C. Webel is managing director of Innocenti & Webel LLC, a renowned firm that specializes in architecture, landscape architecture and strategic planning. He collaborated on A Landscape of Continuity: The Practice of Innocenti & Webel, published by Harvard University in 1997. In addition to presenting lectures throughout the United States, he has also appeared on CNBC and CNN.